Alarm



J. B. LOCKER.

ALARM.

APPLICATION FILED JULY 12, 1921. 1,421,267. Patented June 27, 1922.

2 SHEETS-SHEET l- 0C7R67TNVENTOR ATTORNEY J. B. LOCKER.

ALARM.

APPLICATION FILED lULYl2,192l-.

Patented June 27, 1922 ATTORNEY WITNESS:

JOHN B. LOCKER, OF ST. LOUIS, MISSOURI.

ALARM.

Application filed. July 12,

To (ZZZ 'LU/LOWZ it may concern:

Be it known that l, Jenn B. Loonns, a citizen of the United States,residing at St. Louis. in the county of St. Louis City and State ofMissouri, have invented new and useful improvements in Alarms, of whichthe following is a specification.

The invention relates to improvements in signalling devices andparticularly to that class of devices utilized for sounding an alarm.the invention beingespecially useful in the class of devices known asburglar alarms.

An object of the invention is the provisionof a device ofthe abovecharacter which may be secured to a door-or window and automaticallyoperated by the opening of saiddoor or window to explode a cartridge,torpedo or other explosive, so as to give warning of-the unauthorizedopeningof the said door or window. The inventionis further susceptibleof use as a circuitcloser for sounding a bell or lighting a lamp, orboth.

Another object of the invention is the provision of means wherebythedevices may be rendered inactive, so that the .door or window to whichit is secured, may be opened without operating the alarm.

Other'objects and advantagesof the invention will appear as thefollowing description is read in connection with the accompanying.drawings.

In the drawings Figure 1 is an elevation showing a por tion ofthe insideof a door with the'latter closed and the invention set in positionfor-use.

FiguITexQ is a similar view showing the device after operation.

Figure 3 is a like view locked against operation.

Figure et is a section onthe line 4 i of Figure 1.

Figure 5.is a view looking at the lower end of the device withthe partsin the position shown in Figure 1 and. the anvil block broken away.

Figure 6 is an enlarged sectional view on the line 6-6 of Figure 1.

Figure 7 is a fragmentary section illustrating means for holding thehammer against operation.

Figure 8 is an elevation showing a'type of locking device which may beused in connection with the invention.

Patented J uric 27 119422.

1921. Serial NO. 484,128.

Referring in detail to the drawings, wherein like characters ofreference deIlQte corresponding parts, the reference character 10indicates a portion of .a door, the frame or jamlo of which is indicatedat .11. The invention comprises a frame which is preferably of trianular shape, .;the base ,of which forms a guice arm 12 while thehypothenuse of the triangle forms a hammer arm '13 and the altitude oftletrianglea.connecting means between :the .guide arm and hammer arm,it-he connecting means being indicated at 14. The frame is preferablyformed of resilient wire and the outer end of the'guide arm 12 ispivotallysecured within va block '15 which forms an anvil and serves asa connection between the frame and the door upon which it is mounted.

.Slidingly mounted upon the guide arm 12 is a hammer block, 16, thelatter being provided with an opening for the reception of the guide arm-12,I while extending through the hammer block is an additional openingwhich receives-the freeend o f the hammer arm 13 so that the latterforms axspring to -actuate the hammer block. To increase the springaction of the hammer a'rm'13, the frame is provided with a coil 17 atthe, juncture'of the hammer arm with the connecting means or rod 14. Theanvil block is provided with a socket 18 wl1ich is adapted to receive acartridge, torpedo or other explosive "element and this socket is solocated as to be in theipath of movement of the hammer block 16 so thatwhen the latter is actuated by the'hammer -arm,.the said explosiveelement will sound the, alarm. The frame is designed to be mounted uponthe inside of a door and "for this purpose there isprovided a stem 19which is secured tothe anvil'block and whichrotates within alockingdevice 20 which extends through the door 10. This locking device isdesigned to be controlledby a key land for this purpose there isprovided a key slot 21. Normally the anvil block ispositioned so thatthehammer block will contact with the cartridge or other. elementlocated within the socket 18 but if desired the anvil block may; berotated. through the use; of a suitable key so as to positiontheexplosive element out of the path ofthe hammer block. l-Vhen soarranged thejhammer blockwill contact .with a cushioning or insulatingmember 22 which is carried bylthe anvil block.

In order to set the device there is provided a pair of trigger-s 23.Each of these triggers includes a loop 24 which secured upon theconnecting rod 14 within a loop 25 provided for that purpose so that thetriggers 23 are substantially pivotally mounted within this loop 25.Each of the triggers 23 in addition to the loop includes a hook arm 26and a finger 27, the hook arm ofeach of the triggers being reversely ar'ranged so as to receive between them the hammer arm 13. The fingers 27are arranged substantially at right angles to the hook arms 25 and aredesigned to be secured between the edge of the door 10 and the frame 11so as to be held against movement. The hammer arm 13 will thus besecurely held between the outer ends of the hook arms until the door isopened, which opening will permit the fingers 27 to move so as torelease the hammer arm 13 and cause the hammer to travel along the guidearm 12 for contactwith the explosive element.

If desired the frame may be constructed from a single piece of springwire, or may be formed of separate sections and con.- nected by formingone section with an eye 28 which is received within the loop 25 whilethe extremityof the connecting rod 1-1 and the adjacent portion of theguide arm 12 are surrounded by a binding loop 29.

Additional means may be provided for holding the hammer againstoperation'when the anvil block is rotated to move the explosiveelementout of the path of said hammer block. This means comprises an arm 30having one end pivotally secured within an eye 31 extending through theanvil block. The opposite end of this arm is formed with a hook 32 whichengages over the fingers 27 of the triggers so as to hold them againstdetails of construction and the right is hereiureserved to make suchchanges as properly fall within the scope of the appended claims.

Having described the invention what is claimed is y 1. A signallingdevice comprising a frame, means whereby said frame may be secured to amovable member, an anvil secured to 'the frame, means for holding anexplosive element upon the anvil, a spring actuated ment between themovable member and a stationary member to hold the hammer againstoperation.

2. A signalling device comprising a frame means whereby said frame maybe secured to a movable member, an anvil secured to the frame, means forholding an explosive element upon the anvil, a hammer movable upon theframe, a spring actuated hammer arm included in said frame for operatingthe hammer, means carried by the frame for holding the hammer againstmovement and means included in the hammer holding means for engagementbetween the movable member and a stationary member to hold the hammeragainst operation.

3. A signalling device comprising a frame. means whereby said frame maybe secured to a movable member, an anvil secured to the frame, means forholding an explosive element upon the anvil, a hammer movable upon theframe, a spring actuated hammer arm included in said frame for operatingthe hammer, oppositely movable triggers carried bythe frame andengageable with the hammer arm for holding the hammer against movementand means included in the triggers for engagement between the movablemember and a stationary member to hold the hammer against operation.

4:. A signalling device comprising a frame, means whereby said framemaybe secured to a movable member, an anvil secured to the frame, meansfor holding an explosive element upon the anvil, a spring actuatedhammer movable upon the frame, means carried by the frame for holdingthe hammer against movement, means included in the hammer holding meansfor engagement between the movable member and a stationary member tohold the hammer against operation and means whereby the anvil may bemoved to move the explosive element out of the path of the hammer.

A signalling device comprising a frame, means whereby said frame may besecured to a movable member, an anvil secured to the frame, means forholding an explosive element upon the anvil, a spring actuated hammermovable upon the frame, means carried by the frame for holding thehammer against movement, means included 7 secured to a movable member,an anvil secured to the frame, means for holding an explosive elementupon the anvil, a spring actuated hammer movable upon the frame, meanscarried by the frame for holding the hammer against movement, meansincluded in the hammer holding means for engagement between the movablemember and a stationary member to hold the hammer against operation, keycontrolled means whereby the anvil may be moved to move the explosiveelement out of the path of the hammer and means controlled by theposition of the anvil for engagement with the triggers to preventoperation of the hammer.

7. A signalling device comprising a frame, means whereby said frame maybe secured to a movable member, an anvilsecured to the frame, means forholding an explosive element upon the anvil, a spring actuated hammermovable upon the frame, means carried by the frame for holding thehammer against movement, means included in the hammer holding means forengagement between the movable member and a stationary member to holdthe hammer against operation, key controlled means whereby the anvil maybe moved to move the explosive element out of the path of the hammer anda trigger engaging arm pivotally secured to the anvil for preventingoperation of the hammer.

8. A signalling device comprising a triangular frame, an anvil locatedat one corner of the frame, means for holding an explosive element uponthe anvil, means whereby the frame may be secured in position, a hammerslidingly mounted upon the base of the frame, a spring arm included inthe frame and engageable with the hammer for operating the latter and atrigger carried by the frame and engageable with the spring arm andbetween a movable and a stationary member for holding the hammer againstmovement.

In testimony whereof I affix my signature.

JOHN B. LOCKER.

